PET/MRI has recently become available at the institution and reports of its sensitivity, specificity, NPV (Negative predictive value) , PPV (Positive predictive value), and accuracy in endometrial cancer are not found in the literature to date, to the best of the investigator's knowledge. The GE PET/MRI recently obtained here at Mayo, Rochester has the potential to improve the sensitivity of detection of metastatic disease, compared to other imaging modalities, because of its superior PET technology and updated Q Clear software. For these reasons it is reasonable to expect improved sensitivity to detect metastatic disease in endometrial cancer, possibly proving PET/MRI to be a superior modality for preoperative screening and potentially allowing for less morbid surgical management for patients with high risk endometrial cancer.